Massage gun



FIG. 1 is a top, front and right-side perspective view of a massage gun showing my design;

FIG. 2 is a bottom, rear and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the massage gun which form no part of the claimed design. 

CLAIM The ornamental design for a massage gun, as shown and described. 